/*
 * SecurityInterceptor.java
 *
 * Copyright 2012 the original author or authors(ninglong).
 *
 * Licensed under the web-geek, Version 1.0 (the "License");
 *
 */
package org.geek.app.login.service.impl;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.access.SecurityMetadataSource;
import org.springframework.security.access.intercept.AbstractSecurityInterceptor;
import org.springframework.security.access.intercept.InterceptorStatusToken;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;

public class SecurityInterceptor extends AbstractSecurityInterceptor implements Filter {
	
	private static final Logger logger = LoggerFactory.getLogger(SecurityInterceptor.class);  
	
    private FilterInvocationSecurityMetadataSource urlSecurityMetadataSource;
    
	public FilterInvocationSecurityMetadataSource getUrlSecurityMetadataSource() {
		return urlSecurityMetadataSource;
	}
	public void setUrlSecurityMetadataSource(
			FilterInvocationSecurityMetadataSource urlSecurityMetadataSource) {
		this.urlSecurityMetadataSource = urlSecurityMetadataSource;
	}
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {  
        if (logger.isDebugEnabled()) {  
            logger.debug("doFilter(ServletRequest, ServletResponse, FilterChain) - start"); 
        }
        FilterInvocation fi = new FilterInvocation(request, response, chain);  
        invoke(fi);  
        if (logger.isDebugEnabled()) {  
            logger.debug("doFilter(ServletRequest, ServletResponse, FilterChain) - end");
        }  
    }  
    public Class<? extends Object> getSecureObjectClass() {  
        return FilterInvocation.class;  
    }  
    public void invoke(FilterInvocation fi) throws IOException, ServletException {  
        InterceptorStatusToken token = super.beforeInvocation(fi);  
        try {  
            fi.getChain().doFilter(fi.getRequest(), fi.getResponse());  
        } finally {  
            super.afterInvocation(token, null);  
        }  
    }  
    @Override  
    public SecurityMetadataSource obtainSecurityMetadataSource() {  
        return this.urlSecurityMetadataSource;  
    }  
    public void destroy() {  
        // TODO Auto-generated method stub  
    }  
    public void init(FilterConfig filterconfig) throws ServletException {  
        // TODO Auto-generated method stub  
    }  
}
